The signal generator is a device that provides electrical signals at a offrequencies, square wave, and output levels. It is used as a signal source or excitation source for testing. There are 2 modes supported. Normal Mode: Frequency range 1Hz~150KHz, duty range 0.00%-100%. duty accuracy 1%. Exact Mode: Frequency range 1Hz~15KHz, duty range 0.00%-100%, duty accuracy 0.1%. Work Voltage: DC 3.3V-30V Frequency Accuracy: 2% Duty Range: 0. 00%-100% Output Current: About 5-30mA Output Amplitude: Same to input voltage Work Temperature: -104~185(-40~85) Work Humidity: 0%~95%RH Parameter Setting: This product adjusts the frequency and duty by rotating the potentiometer. It can realize rapid adjustment according to the rotation speed. By default, adjust the duty . Short press the adjustment frequency, long press for 2 seconds to lock, and long press for 5 seconds to switch the mode (normal mode/exact mode). The operation is simple. After setting, the parameters are automatically saved and will not be lost in power failure. The frequency is divided into 4 ranges and switched automatically. 1. XXX: minimum unit 1Hz, value range 1Hz~999Hz. 2. X.: minimum unit 0.01kHz, value range 1.00kHz~9.99kHz. 3. .X: minimum unit 0.1kHz; value range 10.0kHz~99.9kHz. 4. X.X.X: minimum unit 1kHz; value range 1kHz~150kHz. color:Black Material:ABS size:71 x 39mm Package Contents: 2 x Signal Generator Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real . The measurement allowed is +/- 1-3cm.